noun
agony
AG-uh-nee/ˈæɡəni/
Extreme physical or emotional pain.
He sits with his head in his hands in emotional agony.

Etymology
Greek agōnia described a struggle for victory and also mental anguish. The extension to extreme bodily pain perhaps reflects suffering so severe that it causes struggling.
In context
part of the agony of choosing at such moments is that we are in the background consumed by the idea that the wrong choice may prove appalling
More examples
- Waiting for news of her missing child was agony.
- He spent the night in agony with a broken tooth.
- The final moments of the close game were sheer agony for the fans.
Forms
agony · agonies
agonizing adjective — causing extreme pain or distress